Improvement in boring-machines



UNITED STATES JUAN RIBON, OF

PATENT OEEIcE.,

NEW YORK, N. Y.

Specification forming part of Letters Patent No. 98,633, dated January4, 1870..

To @ZZ whom it may concern: y

Be it known that I, JUAN RIEoN, of New York city, county and State ofNew York, have invented a new and Improved Boring Machine; and I dohereby declare that the.

following is a' full, clear, and exact description thereof, which willenable others skilled in theart to make and use the same, referencebeing had to the accompanying drawings, forming part of thisspecification.

Figure 1 represents a side elevation of my improved boring-machine. Fig.2 is an end elevation of the same. Fig. 8 is a longitudi nal section ofthe same. Fig. 4. is a plan or top view of the same.

Similar letters of reference indicate corresponding parts.

The object of this invention is to construct a drill which can beadjusted in such manner that the speed can be reduced and powerincreased during the operation of boring, while the power may be readilydiminished and the speed increased when the drill is reversed to bewithdrawn from the wood or other material.

The invention consists in a novel combina tion of adjustable gear-wheelswith the operating stationary nut, and arranged as hereinafter morefully described.

a in the drawings represents the frame of my improved boring-machine. Itis made of wood or other suitable material, of suitable form and size.On the frame are arranged the bearings b b of a horizontal shaft,c,which is the operating-shaft of the drill. Upon the shaft c is iitteda sliding sleeve, which carries bevel-gear wheels d and d at its ends,and which can be moved longitudinally by means of a clutch-lever, c,that is pivoted to the frame. The sleeve is by groove and feather soconnected with the shaft c that it must necessarily revolve with ,thesame.

gis a cross-bar "of the frame, perforated to receive the tubular axle ofa wheel, which carries on its face two concentric circles, f and j", ofbeveled teeth. These teeth f f are so arranged that the wheel d can gearinto the outer circle, f, or the wheel d' into the inner circle, f, bymoving the wheel of the shaft ,0. The socket of the drill proper isformed in a screw, 7c, which is fitted into a stationary nut, g', thatis suspended from the bar y, the screw being vertically adjustable inthe tubular nut. The screw k is of tubular form, closed at the lowerend, and is fitted concentrically around and secured to the lower end ofa shaft, h, that is tted through the tubular hub or shaft of the wheelff. The shaft h is by feather and groove fitted in said hub, so that itwill revolve with and slidein the same. The lower end of the wheel-hubts into the annular space which is between the screw 7c and shaft h, asshown.

The operation is as follows: When the wheels d and f are in gear, andthe shaft g is turned by proper mechanism in the right direction, thewheel and with it the shaft hf,and screw k, will be turned, so as tomove the latter down in the nut and to force the tool down. The wheel fbeing much larger than the wheel d, the screw is turned slow and withmuch power. lWhen a hole has been drilled,thele ver e is moved to carryd into gear witlrf; 'thereby the motion of the screw and tool will bereversed and made much more rapid. The drill will consequently bewithdrawn much more rapidly than it was forced in, but with less power.For boring soft wood the wheels df/ can be always kept in gear, in whichcase the motion of the shaft c must be reversed.

Having thus described my invention, I claim as new and desire to secureby Letters Patentthe-wheels d d, in combination with the con centricwheels ff', nut g', screw k, and vertical shaft h, all arranged tooperate substantially as herein shown and described.

JUAN RIBON.

Witnesses ALEX. F. ROBERTS, FRANK BLooKLEv.

-The shaft c and sliding sleeve which carries

